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A083036 Partial sums of A083035. 7
1, 1, 1, 2, 3, 3, 4, 5, 5, 5, 6, 6, 6, 7, 8, 8, 8, 9, 9, 9, 10, 11, 11, 12, 13, 13, 13, 14, 15, 15, 16, 17, 17, 17, 18, 18, 18, 19, 20, 20, 21, 22, 22, 22, 23, 24, 24, 25, 26, 26, 26, 27, 27, 27, 28, 29, 29, 29, 30, 30, 30, 31, 32, 32, 33, 34, 34, 34, 35, 35, 35, 36, 37, 37, 37, 38 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Table of n, a(n) for n=1..76.

MATHEMATICA

Accumulate[Table[Floor[Sqrt[2]n]-2Floor[n/Sqrt[2]], {n, 120}]] (* Harvey P. Dale, Mar 08 2017 *)

PROG

(PARI) first(n)=my(s); vector(n, k, s+=a(n)=sqrtint(2*k^2)%2) \\ Charles R Greathouse IV, Sep 02 2015

CROSSREFS

Cf. A083035, A083037, A083038.

Sequence in context: A075458 A267861 A253548 * A241920 A202305 A195778

Adjacent sequences:  A083033 A083034 A083035 * A083037 A083038 A083039

KEYWORD

nonn

AUTHOR

Benoit Cloitre, Apr 17 2003

STATUS

approved

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Last modified May 20 20:16 EDT 2019. Contains 323426 sequences. (Running on oeis4.)